Apparatus, system, and method for image registration

Abstract

An apparatus, system and method of print registration are provided. The invention includes first and second optical channel modules configured to communicate light from a page to a sensor module. The sensor module sums the light from the first and second optical channel modules and detects one or more light transitions as a first registration mark of a first image of the page moves past the first optical sensor module and as a second registration mark of a second image of the page moves past the second optical channel module. The invention determines that the first image and the second image are registered if the sensor module detects a single light transition as the first registration mark and the second registration mark pass the first and the second optical channel modules. In addition, the invention determines that the first image and the second image are mis-registered if the sensor module detects a plurality of light transitions as the first registration mark and the second registration mark pass the first and the second optical channel modules.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]This invention relates to print registration and more particularly relates to image registration with a single optical sensor.[0003]2. Description of the Related Art[0004]Printing systems such as duplex image printing systems and color image printing systems often register two or more separate images on one or two sides of a page. The page may be paper, a printed form, a continuous feed printed form, or a carton. Registration involves aligning each image in a desired position relative to each other image or images. Images are mis-registered when one or more images are not aligned as desired relative to the other images.[0005]For example, a duplex printing system prints a first image on the anterior side of a page and a second image on the posterior side of the page. The first image and the second image are considered to be registered if they are aligned relative to each other so that the first image and the second image...

AI Technical Summary

Benefits of technology

[0024]The present invention uses a single sensor module to detect the registration and mis-registration of a plurality of registration marks. The present invention may consequently reduce the cost of a registration detection device. These features and advantages of the present invention will become more fully apparent from the following description and appended claims, or may be learned by the practice of the invention as set forth hereinafter.

Problems solved by technology

It is a drawback of such a system that the registration detection device 200 must include at least two optical sensors to register the images on the page 105.

Two optical sensors and the sophisticated logic increase the cost of the registration detection device 200.

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